12. Subjects who are receiving concomitant treatment or who during the study are likely to start the treatment with potent CYP3A4 and CYP2C9 inhibitors (e.g. protease inhibitors ritonavir and saquinavir, ketoconazole, itraconazole, Miconazole, nefazadone, claritromycin, troleandomycin erythromycin and cimetidine).